Bimetal Thermometers

Bimetal Thermometers from Marsh Instruments feature an all-welded corrosion-resistant 304 stainless steel construction. These bimetal thermometers combine the benefits of economy and reliability for locally mounted temperature indication requirements in dual scale ranges from -50° to +1,000°F (-40° to +525°C). The extremely responsive bimetal sensing element provides measurement accuracy within ±1% of full scale. The hermetically sealed and ruggedly built case is resistant to shock, vibration, dust and moisture. Built-in over range protection is a standard feature. An external adjustment screw on the back of the 3″ and 5″ cases provides convenient reset and field recalibration. Additional advantages offered by Series “L” bimetal thermometers include an easy-to-read dual scale, fast response and accurate temperature indication.



  • Dial sizes of 2″, 3″ and 5″
  • Nine dual scale ranges to +1,000°F (+525°C)
  • 1% FS accuracy
  • Stem lengths to 24″
  • Hermetically sealed, rugged case design
  • Built-in overrange protection
  • External reset feature for field recalibration (3″ & 5″ dials)
  • Optional “L” series models


  • Process control
  • Offshore oil, gas and petrochemical
  • Power generation
  • Chemical processing industries
  • Industrial, HVAC and OEM applications